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  • How to use this piece of code in a function

    - by oliverbj
    I have this jQuery code: var vis = (function(){ var stateKey, eventKey, keys = { hidden: "visibilitychange", webkitHidden: "webkitvisibilitychange", mozHidden: "mozvisibilitychange", msHidden: "msvisibilitychange" }; for (stateKey in keys) { if (stateKey in document) { eventKey = keys[stateKey]; break; } } return function(c) { if (c) document.addEventListener(eventKey, c); return !document[stateKey]; } })(); vis(function(){ document.title = vis() ? 'Visible' : 'Not visible'; }); What it does now is to change the document title of the page. If the page is not visible, it will be changed to that and vise verca. My question is, how can I use this function like this: if page is visible{ //do something } if page is not visible{ //do something else }

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  • PHP5: restrict access to function to certain classes

    - by Tim
    Is there a way in PHP5 to only allow a certain class or set of classes to call a particular function? For example, let's say I have three classes ("Foo", "Bar", and "Baz"), all with similarly-named methods, and I want Bar to be able to call Foo::foo() but deny Baz the ability to make that call: class Foo { static function foo() { print "foo"; } } class Bar { static function bar() { Foo::foo(); print "bar"; } // Should work } class Baz { static function baz() { Foo::foo; print "baz"; } // Should fail } Foo::foo(); // Should also fail There's not necessarily inheritance between Foo, Bar, and Baz, so the use of protected or similar modifiers won't help; however, the methods aren't necessarily static (I made them so here for the simplicity of the example).

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  • Catching the return of main function before it deallocates resources

    - by EpsilonVector
    I'm trying to implement user threads in Linux kernel 2.4, and I ran into something problematic and unexpected. Background: a thread basically executes a single function and dies, except that when I call thread_create for the first time it must turn main() into a thread as well (by default it is not a thread until the first call, which is also when all the related data structures are allocated). Since a thread executes a function and dies, we don't need to "return" anywhere with it, but we do need to save the return value to be reclaimed later with thread_join, so the hack I came up with was: when I allocate the thread stack I place a return address that points to a thread_return_handler function, which deallocates the thread, makes it a zombie, and saves its return value for later. This works for "just run a function and die" threads, but is very problematic with the main thread. Since it actually is the main function, if it returns before the other threads finish the normal return mechanism kicks in, and deallocates all the shared resources, thus screwing up all the running threads. I need to keep it from doing that. Any ideas on how it can be done?

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  • odd behavior setting timeouts inside a function with global references in javascript

    - by Pablo
    Here is the the function and the globals: $note_instance = Array(); $note_count = 0; function create(text){ count = $note_count++; time = 5000; $note_instance[count] = $notifications.notify("create", text); setTimeout(function(){ $note_instance[count].close() }, time); } The function simply opens a notification, a sets a timeout to close it in 5 seconds. so if i call this create("Good Note 1"); create("Good Note 2"); create("Good Note 3"); Ecah note should close 5 seconds from their creation, however always and only the last note closes, in this case "Good Note 3". Each note object has its own entry in the the $note_instance global array so the timeouts should no be overwriting themselves. What am i missing here folks? Thanks in advance

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  • Function pointers in javascript using django

    - by Hulk
    Is this a valid function pointer code below, In views , def change(request): dict={} function_ptr="create()" dict.update({'function_ptr' : function_ptr}) return render_to_response('mpjt/create.html',context_instance=RequestContext(request,{'dict': dict})) In create.html $(document).ready(function() { var a = '{{dict.function_ptr}}' func_ptr(a); function create() { alert('got respponse'); } }); Thanks..

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  • Which button called the function?

    - by StoneBreaker
    I have two buttons which call the same function. That functions signature is - (IBAction)eraseTextField {...} I would like to figure out what button called the function. So I would like for the functions signature to be something like - (IBAction)eraseTextField: (id)sender {...}. Is there a way for the system to know to send the id of the calling object to a function that it calls? Thanks for the help.

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  • What are the javascript performance tradeoffs in adding id's to dom elements?

    - by Blinky
    For example, I have a website which has a dynamically-generated segment of its dom which looks roughly like this: <div id="master"> <div class="child"> ... </div> <div class="child"> ... </div> <div class="child"> ... </div> ... <div class="child"> ... </div> </div> There might be hundreds of child elements in this manner, and they, too, might have yet more children. At present, none of them have id's except for the master. Javascript manipulates them via dom-walking. It's a little scary. I'd like to add id's, e.g.: <div id="master"> <div id="child1" class="child"> ... </div> <div id="child2" class="child"> ... </div> <div id="child3" class="child"> ... </div> ... <div id="childN" class="child"> ... </div> </div> What are the tradeoffs in adding id's to these divs? Certainly, jQuery must maintain a hash of id's, so there's going to be some sort of performance hit. Any general guidelines in when adding additional id's is a bad idea? Is jQuery so awesome that, in practice, it doesn't matter?

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  • Add function to existing JQuery plugin

    - by kralco626
    Is it possible to add a function to a plugin without modifying the actual plugin? Can I do something like this in my site's js file? $.fn.Watermark.Refresh = function() { $.Watermark.HideAll(); $.Watermark.ShowAll(); } or (function($){ $.fn.Watermark.Refresh = function() { $.Watermark.HideAll(); $.Watermark.ShowAll(); }; })(jQuery); neither worked, the first says $ is undefined, the second that jQuery is undefined... ideas? Solution: Either method works, just include the jquery file before the site js file.

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  • What are good uses for Python3's "Function Annotations"

    - by agscala
    Function Annotations: PEP-3107 I ran across a snippet of code demonstrating Python3's function annotations. The concept is simple but I can't think of why these were implemented in Python3 or any good uses for them. Perhaps SO can enlighten me? How it works: def foo(a: 'x', b: 5 + 6, c: list) -> max(2, 9): ... function body ... Everything following the colon after an argument is an 'annotation', and the information following the -> is an annotation for the function's return value. foo.func_annotations would return a dictionary: {'a': 'x', 'b': 11, 'c': list, 'return': 9} What's the significance of having this available?

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  • Attaching a jquery function to some textboxes

    - by diver-d
    I am a newbie to jquery and need a little help. I have created the below function which does what I want it to however when I select a textbox every other textbox are automatically selected. How do I change it and pass a parameter from the textbox so only the selected textboxes css changes on focus and blur? <script language="javascript" type="text/javascript"> $(function () { $('.myTextBox').focus(function () { $('.box.textbox').addClass("active"); }).blur(function () { $('.box.textbox').removeClass("active"); }); }); </script>

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  • JQuery\Javascript - Passing a function as a variable.

    - by Josh
    I was just curious if I could pass a function as a variable. For example: I have a function $('#validate').makeFloat({x:671,y:70,limitY:700}); I would like to do something like this: $('#validate').makeFloat({x:function(){ return $("#tabs").offset().left+$("#tabs").width();},y:70,limitY:700}); This does not work, but ideally every time the variable was accessed it would compute the new value. So if the window was resized it would automatically adjust as opposed to a variable passed in being static. I realize I can implement this directly inside the function\widget, but I was wondering if there was some way to do something like the above.

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  • get an id of child element and store in a variable using jquery?

    - by Simpson88Keys
    I'm basically trying to do exactly what the subject suggests, but I'm getting "undefined" in my alert, and I'm not entirely sure why. I am fairly new to jquery, so, I probably have the syntax wrong, but not sure where to go from here. I'll post both of my attempts, which both yield "undefined" in the alert... //In my first attempt, I'm trying to get the id of the inner a tag <ul> <li id="l1" class="active"><a href="#c1">Samp 1</a></li> <li id="l2" class=""><a href="#c2">Samp 2</a></li> <li id="l3" class=""><a href="#c3">Samp 3</a></li> </ul> var selected = $(".active).children("a").attr("id"); alert(selected); //In my second attempt, I'm trying to get the id of the currently selected li var selected = $(".active").attr("id"); alert(selected);

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  • jquery: Toggle elements based on result from a function

    - by Svish
    I have a number of table rows that I would like to toggle the visibility of. They should be visible if a data item I have set on them earlier equals a selected value in a form. This is what I have so far: $('#category-selector').change(function(event) { var category_id = $(this).val(); if(!category_id) { $('tr', '#table tbody').show(); } else { $('tr', '#table tbody').toggle(); } }); Of course this just toggles them on and off. Thing is that I thought I was able to give toggle a function that would decide if each row should be on or off, but it turns out I can only give it a boolean condition which would be an all or nothing deal kind of... So, I have this function: function() { return $(this).data('category_id') == category_id; } How can I use that to go through all the rows and toggle them on or off? Or is there a better approach to this? What should I do?

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  • How do I create "undo" in c++?

    - by b3y4z1d
    I've got a couple of codes to do some things but I need to create a function that undoes the previous task/addition/change.How do I do this in Borland C++? (the program stores strings of text in a text file using "list",it is stored and then erased unless I use the save-function I've created) right,so I don't know if I've forgotten to mention anything of importance for you to be able to help me better,but if there's something you're wondering about the functions just ask. I meant creating an undo function in a simple consol application by the way.

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  • Create a function to a function that runs a for loop?

    - by user637364
    Hi, I have made some code that creates a red border around an image when the user click on to highlite thats the choesen one. But I want to erase previous or all border with a white border around all images before a new click is made on another image. My question is how do I activate a call to a function when a click is made and how would a function look in jQuery? I just whant to use the .css to change the border in perhaps a loop and change the id of the images? Can I mix common javascript with jQuery, or should it only be pure jQuery code in a script? This is a simplified part of the code, it contains "minibild_1" to "minibild_5" $(document).ready(function(){ $("#minibild_1").click(function(){ $("#minibild_1").css({"border":"2px solid #D00C33"}); $("#storbild").attr("src","../bilder/bilder_stora/{$row1-bild_1}.jpg"); }); $("#minibild_2").click(function(){ $("#minibild_2").css({"border":"2px solid #D00C33"}); $("#storbild").attr("src","../bilder/bilder_stora/{$row1-bild_2}.jpg"); }); });

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  • trouble setting node['chef-client']['interval']

    - by atiniir
    I've searched many places and haven't get found the answer to this, I suspect I'm missing something either fundamental or basic (maybe both) I'm using the chef-client::windows_service recipe and trying to set the interval and can't seem to sort it out. I've tried at the role level with: { "defaults": { "chef_client": { "interval":15 } }, "overrides":{ } } and at the node level with: { "chef_client": { "interval":25 }, "tags":[] } but the interval on the node is still 1800 (default)

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  • Execute dynamic function with param in javascript

    - by Valamas
    if the following possible? I wish to move the alert(result) into a function and to dynamically call it. Current $.ajax(this.href, { success: function (result) { alert(result); AjaxComplete(); } }); My Attempt - not working $.ajax(this.href, { success: function (result) { window["MyAlert(result)"](); AjaxComplete(); } }); function MyAlert(result) { alert(result); } Is this possible?

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  • DI: Injecting ActionFilterAttribute implementation (ASP.NET MVC)

    - by Sosh
    I was wondering if it is possible to inject a particular ActionFilterAttribute implementation using a IoC container. For example, imagine you create a TransactionAttribute class [Transaction] You use this to decorate action which should be wrapped in a transaction in the persistence layer. But implementation details of the attribute will be tied to the persistence tech you are using, but strictly speaking, your controller should not know about this, and you might want to swap this out. What I would like to do, is define some kind of TransactionAttribute interface, and then have my IoC inject the correct implantation. So on my actions I only need specify: [Transaction] public ActionResult SomeAction() { .... } ...and the IoC will inject the correct implementation depending on config (eg. something like NHibernateTransactionAttribute, or SomeOtherORMTransactionAttribute). Is this possible? Has anyone done it?

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  • Can you step into specific properties in VS 2010?

    - by cyclotis04
    I know that you can either step into every property or not step into every property, but I would really like to be able to step into a specific property, and not the rest. Is this possible? (I also know I can use keyboard commands, but I'm asking if there's a more permanent solution.) I have a lot of properties and my setters do important things, so it's silly to step over them, but most of my getters are pointless. I'm looking for something like: public string ImportantProperty { get { return _importantProperty; } [DebuggerStepThrough(false)] set { if (this.State != ConnectionState.Closed) throw new InvalidOperationException( "Important Property cannot be changed unless This is closed."); if (ImportantProperty == value) return; _importantProperty = value; OnImportantPropertyChanged(new EventArgs()); } } Unfortunately, I can't find anything that will act like [DebuggerStepThrough(false)] and I must resort to turning off property step-over and putting [DebuggerStepThrough] everywhere I don't want to step-through.

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  • R: getting a function name as a string

    - by HamiltonUlmer
    Say I have a bunch of functions, each with something likeMyFunction.1, etc. I want to pass these functions into another function, which prints out a small report. Ideally I'd like to be able to label sections of a report by which function is being used to generate the results. So are there any nice ways of getting the name of a predefined function as a string?

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